Intelligent Sampling Of Heart Rate
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United States of America Patent
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Issued Date -
Dec 31, 2015
app pub date -
Jun 26, 2014
filing date -
Jun 26, 2014
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Abstract
An activity monitor reduces power consumption by providing a heart rate sensor in an inactive mode at times when the heart rate is relatively unimportant. Data from a motion sensor is used to determine when to activate the heart rate monitor to obtain heart rate readings. For example, the motion data may indicate that the user is becoming active after a period of inactivity, or the user is vigorously exercising, then terminates the exercising, or the user is in a sleep-related activity such as the onset of sleep, non-REM (rapid-eye movement sleep) sleep, REM sleep and the user waking from sleep. The heart rate sensor may be in a continuously active mode, an alternating mode, or an inactive mode. In the alternating mode, a delay between readings is set adaptively based on the user's level of activity.
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